As she was announced as Ant’s replacement in August, Holly made it clear there were a few things about jungle life that she wouldn’t be entirely comfortable with.

"I’m scared of everything," she boldly admitted.

In a bid to help Holly before she jetted out to Australia, Phillip Schofield and This Morning team put together a series of mock trials to help her face her fears.

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I’m A Celebrity’s Holly Willoughby loses it as Dec Donnelly burps in her face

Kendra Wilkinson takes on rats in 2014
(Image: Rex)

Westlife’s Kian Egan was trapped in a box full of them
(Image: ITV / Rex)

One of the challenges of ‘Box of Shocks’ saw Holly blindly having to put her hand into a container with three kittens inside, that she immediately assumed were rats.

As Holly screamed in terror, Declan Donnelly, who was sat at home watching, tweeted: "“She was worse than Gillian McKeith! What the heck are we in for!?”

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Holly admitted to Phil she was ‘scared of everything’
(Image: Supplied by WENN)

Holly strokes kittens, thinking they’re rats
(Image: ITV)

And fans have been left wondering if Holly’s phobia is the reason for the absence of rats in this year’s trials so far.

In tonight’s trial Harry Redknapp, Nick Knowles and John Barrowman all come up against fish guts, slime and cockroaches in the first challenge of the Immunity Games.

There’s gunge and coackroaches – but no rats
(Image: ITV)

Fans are wondering at the lack of four legged creatures
(Image: Twitter)

Earlier today an ITV presenter claimed that Ant McPartlin has still be working on I’m A Celebrity behind the scenes, despite taking a year off from hosting the show.

Emma Jesson, who is best known for forecasting the weather on ITV, took to Twitter on Wednesday to claim that Ant is still involved in scripting live TV links between Declan Donnelly and temporary replacement host Holly Willoughby .